Image source, EPA

About an hour ago, Donald Trump warned that "a whole civilisation will die tonight" unless Iran reaches a deal on reopening the Strait of Hormuz.

As we reported earlier, this isn't the first deadline Trump has set during this conflict - here's a recap:

• Deadline 1: On 21 March, Trump said he would "hit and obliterate" power plants, "starting with the biggest ones first", if Iran didn't reopen the waterway within 48 hours
• Deadline 2: Two days later, he said there had been "very good and productive conversations" between the countries and postponed strikes against energy infrastructure for five days
• Deadline 3: On 27 March, Trump said he would postpone attacking energy plants for 10 days, "as per [an] Iranian government request", bringing the deadline to 6 April
• 48-hour warning: On Friday, with the 6 April deadline looming, he warned that Iran had "48 hours" before he unleashed "all hell"
• Expletive-laden threat: In a Sunday post peppered with expletives, Trump reiterated this threat, saying that "Tuesday will be Power Plant Day, and Bridge Day" - in a later post he said "Tuesday, 8:00 P.M. Eastern Time!"
• Latest threat: On Tuesday, Trump shared a message on TruthSocial that said "a whole civilization will die tonight, never to be brought back again. I don’t want that to happen, but it probably will".

The Islamic Revolutionary Guard Corps says it has struck a petrochemical complex in the Jubail area of Saudi Arabia, in a statement shared by Iranian state news agency IRNA.

In the statement, it says the drone and missile attack was a response to the targeting of petrochemical plants in Iran on Monday.

This follows an earlier report about an attack on the the complex in Jubail from the AFP news agency, which said it had spoken directly to a source on the ground.

The attack caused a fire at the complex and loud explosions were heard, they quoted the source as saying.

Earlier in the day, several Iranian media outlets - including Fars, Nour and Tasnim - also reported on the fire, and shared a video they said showed the complex on fire.

The BBC has not been able to independently verify the claims, and authorities in Saudi Arabia have not commented on the reports.

More now from JD Vance in Budapest, where he has addressed recent reports that the US has struck Kharg Island.

He says he was aware of intentions to "strike some military targets" on the island and he believes the US has "done so".

He adds that strikes do not represent a change in strategy for Donald Trump, who has warned of "complete demolition" of Iranian infrastructure if the country does not respond to tonight's deadline to make a deal to reopen the Strait of Hormuz.

Vance says that Iran is trying to "exact as much economic pain on the world as possible," but that the US has the ability to exact "much greater pain".

He adds that he is confident the US will receive a response from the Iranians by 20:00 EDT tonight (00:00 GMT / 01:00 BST Wednesday): "I hope they make the right response."

Image source, AFP

US Vice President JD Vance has been speaking in Budapest, where he's meeting Hungary's leader Viktor Orban.

Taking questions from reporters, the Washington Post asks Vance if he has any new information that suggests a deal can be reached between the US and Iran.

In response, Vance says the US has "fundamentally" completed its military objectives in Iran. The nature of the war's conclusion is up to the Iranians, he goes on, adding that there are "two pathways" for the war to end.

One is where "Iranians decide they're going to be a normal country, they're not going to fund terrorism anymore, they're going to be part of the world system of commerce and exchange".

The other option, Vance says, is "if the Iranians don't come to the table... then the economic situation in Iran will continue to be very very bad".

As we've just reported, a US official has confirmed to CBS News that American forces conducted strikes on military targets on Iran's Kharg Island.

The US previously targeted the island in March, with President Trump saying military targets had been "totally obliterated".

Today, the unnamed official told CBS - the BBC's US news partner - that oil infrastructure was not targeted in the overnight attack.

Kharg Island is home to a major oil terminal that is considered Iran's economic lifeline. Trump has previously indicated that he may send troops to seize control of the island.

Image source, Reuters

Earlier we brought you reports that Iran's Kharg Island had been struck.

Now, a US official has confirmed to CBS News - the BBC's US media partner - that American forces have conducted new strikes on military targets on Iran's Kharg Island.

The official is reported to have said that oil infrastructure was not targeted in the overnight attacks.

Image source, EPA

US President Donald Trump has just posted on Truth Social, warning: "A whole civilization will die tonight, never to be brought back again".

He goes on:

"I don’t want that to happen, but it probably will. However, now that we have Complete and Total Regime Change, where different, smarter, and less radicalized minds prevail, maybe something revolutionarily wonderful can happen, WHO KNOWS?

"We will find out tonight, one of the most important moments in the long and complex history of the World. 47 years of extortion, corruption, and death, will finally end. God Bless the Great People of Iran!"

• For context: Trump has given Iran a deadline of 20:00 EDT Tuesday (00:00 GMT / 01:00 BST on Wednesday) to reopen the Strait of Hormuz.

A strike on a bridge in Iran's Kashan city has reportedly killed two people and injured three others, according to Iranian state-run news agency IRNA.

The outlet reports Akbar Salehi, the deputy security officer of the governor of Isfahan, as saying the Yahya Abad railway bridge in the city had been attacked.

The BBC has not been able to independently verify the claim and is looking further into the report.

It comes hours after the Israeli military warned people in Iran not to take trains "for the sake of your security", and a day after President Donald Trump threatened "complete demolition" of Iranian infrastructure.

In a new statement, Iran's Islamic Revolutionary Guard Corps (IRGC) says it has shown "considerable restraint" and "exercised care in selecting targets for retaliation" against the US and its regional partners.

"From this point forward, all such considerations will be set aside," it says in a statement shared on state-run media.

The IRGC also says that if the US military "crosses red lines, our response will go beyond the region" - adding that it will target the US and its partners' infrastructure and disrupt regional oil and gas supplies for years.

Kharg Island, the terminal for much of Iran's oil exports in the Gulf, has been hit by several strikes, according to Iranian state news agency MEHR and US outlet Axios.

We're working to find out more information on this and will bring you any details we get.

Trump hopes to force a deal with Iran - but the Islamic Republic is in no mood to make concessionspublished at 12:30 BST

12:30 BST

Frank Gardner
Security correspondent

Iran rarely responds to overt threats and ultimatums in the way some people might expect.

Having managed to survive more than a month of devastating airstrikes and precision bombing by two of the world’s most powerful militaries, the Islamic Republic is in no mood to make concessions.

It’s hurting, there is no doubt about that, but partly due to its ideology of martyrdom its pain threshold is far higher than that of Western nations.

Donald Trump will be hoping that his expletive-laden threat to bomb Iran "back to the Stone Ages" will be enough to terrify Tehran into releasing its chokehold on the Strait of Hormuz.

But this is Iran’s strongest card and it’s not going to give it up without a permanent end to this war - plus other demands like ending Israel’s war on Hezbollah.

Meanwhile, Iran has made clear that whatever civilian infrastructure the US targets on Tuesday night it will correspondingly target in the Gulf states.

So Kuwait, Bahrain, Saudi Arabia, the UAE and possibly Qatar will be bracing themselves if Trump makes good on his threat.

Image source, Reuters

A little earlier, we brought you initial reports suggesting three people had been killed in a shooting near Israel's consulate in Istanbul.

We've since heard from the city's governor Davut Gül, who says one attacker has been killed and two more have been "neutralised".

Two police officers have been injured and the attackers have been identified, according to Turkey's interior minister - he says one suspect has "ties to an organisation that exploits religion".

• Our colleagues are continuing to report updates on this developing story, which you can follow here

Iran's Fars news agency says railway services have been cancelled in Mashhad, in the north-east of Iran, following a warning from the Israeli military that Iranians should avoid travelling by train as it "endangers your life".

The governor of Mashhad is quoted as saying trains will cease "until further notice" as a precaution.

The statement also says alternative road transport is available for passengers who cannot delay their journey.

Iran has launched more missiles at Israel, the Israeli military says.

The statement from the Israel Defense Forces (IDF) says defence systems were working to intercept the missiles.

In a separate update, it says that members of the public can leave protected spaces, having previously asked people to shelter if they received a warning alert.

Image source, EPA

In Sri Lanka, the largest-ever relief package is being rolled out for farmers, fishermen and low-income households amid soaring energy costs.

The island nation is heavily dependent on oil from the Middle East, and fuel prices have increased by a third since the war began on 28 February.

President Anura Kumara Dissanayake says the package will help those most vulnerable, particularly anyone living below the poverty line.

Sri Lanka is now in talks with Russia for backup supplies of gas, coal, fuel and fertiliser.

Three people have reportedly been killed in a shooting near the Israeli consulate in Istanbul, according to Turkish media.

Two police officers are said to have been injured, according to Turkey's state broadcaster.

There's been no official confirmation of casualties yet, and details of the incident are still emerging.

• We've got a separate live page taking in the latest - you can follow that here

A container ship has been struck by an unknown projectile in waters south of Kish Island in Iran, the United Kingdom Maritime Trade Operations (UKMTO) reports.

Kish Island is a resort island in the Hormozgan Province off the southern coast of Iran.

The incident has caused damage to parts of the vessel above the waterline, UKMTO says, adding that the "crew are safe and accounted for".

Authorities are said to be investigating.

Images show smoke and fire from direction of Tehran airportpublished at 10:49 BST

10:49 BST

Image source, X/VahidOnline

By Richard Irvine-Brown and Shayan Sardarizadeh

BBC Verify has been examining imagery which appears to show a second consecutive night of reported strikes on Mehrabad International Airport in Tehran.

Verified pictures and video clips show at least four fires and huge plumes of smoke rising from the direction of the parallel runways at Mehrabad.

The images first appeared publicly online around 01:00 BST on Tuesday (03:30 local time) and BBC Verify was able to confirm the location they were captured from by identifying a nearby mosque and a high-rise building.

The emergence of these clips follows verified video showing the aftermath of previous strikes on the airport on Sunday, which Israel’s military said on Monday targeted “dozens of Iranian Air Force aircraft and helicopters” at Mehrabad and two other airports in Iran’s capital.

In Lebanon, at least eight people were killed in air and drone strikes overnight, the country's National News Agency (NNA) reports.

Dozens were reportedly wounded in the strikes, which targeted large areas of southern Lebanon and the western Beqaa in eastern Lebanon.

The outlet says the strikes "destroyed homes and caused widespread damage", while reconnaissance flights were observed flying over the country.

It comes as the Israeli military says soldiers of its 98th Division have, in the past week, "expanded their targeted ground operations to additional targets in southern Lebanon".

Image source, AFP via Getty Images

The aircraft the US has lost in the Iran warpublished at 09:50 BST

09:50 BST

Image source, Social media

By Emma Pengelly and Alex Murray

The US has lost at least nine aircraft in the war so far, according to image analysis, official statements and briefings to US media.

CBS News reported on 5 April, citing US officials, that two transport planes, external sent to assist the F-15E rescue mission were unable to take off from a remote base in Iran. It reported the planes were destroyed to prevent them from falling into enemy hands. Verified photos (including the one above) showed a smouldering aircraft wreckage in central Iran. BBC Verify has asked experts to analyse the debris to identify the aircraft type.

On 3 April,a fighter jet was shot down over central Iran. Debris in aftermath photos came from a US F-15E Strike Eagle, an expert told BBC Verify. Thatsameday, the New York Times reported, external, citing US officials, that an A-10 Warthog aircraft crashed in the Gulf. Its pilot reportedly ejected before being rescued.

Images we verified on 29 March showed an E-3 Sentry command and control aircraft split in two at Prince Sultan air base in Saudi Arabia, following reports of an Iranian attack.

On 12 March,six crew members died when a US KC-135 refuelling aircraft went down in western Iraq, the US Central Command (Centcom) said. The circumstances are under investigation but Centcom ruled out hostile and friendly fire.

And on 2 March,three US F-15E jets were downed over Kuwait in what Centcom described as"an apparent friendly fire incident". All six crew ejected safely, it said. BBC Verify confirmed video showingone F-15spinning towards the ground west of Kuwait City and footage of a crew member next to a used parachute.